Human Rights Campaign, a national gay rights group, is using the color red to promote support for gay marriage.

(USA TODAY) -- Human Rights Campaign, a national gay rights group, is using
the color red to promote support for gay marriage, urging people who
agree to wear the color and use it online.

The action comes as the Supreme Court considers arguments over the legality of same-sex marriage this week.

"Red
symbolizes love. That's what marriage is all about," said Charlie
Joughin, a spokesman for Human Rights Campaign. "It's incredible the
people who are making a statement supporting love."

The
group's logo, which is usually a yellow "equals" sign on a blue
background, has been changed to a pink sign on a red background. The
change happened Tuesday as the court heard arguments over the Defense of
Marriage Act.

Human Rights Campaign encouraged its more than 1
million Facebook fans to wear red and change their profile pages to red.
The post has 11,000 likes and 30,000 shares.

George Takei, famous for his role on Star Trek,
was among people who changed their profile pictures to Human Rights
Campaign's new red logo. Others included Lance Bass, a member of boy
band *NSYNC, Maryland Gov. Martin O'Malley, a Democrat, and Fla. Rep.
Debbie Wasserman Schultz, chairwoman of the Democratic National
Committee.

Some businesses also joined the effort. GroupOn, a
daily deals website, posted a video of dozens of employees wearing red
shirts. ABSOLUT Vodka tweeted its support with a photo of a bottle
wrapped in red fabric.

Joughlin said, "We've got folks all across
America using this as a visible and public way to show support for
marriage equality."